Knowledge graph

UN numbers for dangerous goods

Every hazardous substance shipped by road, rail, sea or air has a four-digit UN number that identifies it in the ADR, DOT, IMDG and IATA regulations. Curated list of the substances most commonly transported.

Class 2

Class 2.1 Flammable gases

Class 2.2 Non-flammable, non-toxic gases

Class 2.3 Toxic gases

Class 3 Flammable liquids

Class 4.1 Flammable solids

Class 4.2 Substances liable to spontaneous combustion

Class 4.3 Substances which, in contact with water, emit flammable gases

Class 5.1 Oxidising substances

Class 6.1 Toxic substances

Class 6.2 Infectious substances

Class 8 Corrosive substances

Class 9 Miscellaneous dangerous substances